Patents by Inventor Edward Hugo Hoffman

Edward Hugo Hoffman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Engine muffler
    Patent number: 4119174
    Abstract: An engine muffler which includes a chamber divided into two balanced sections, an inlet pipe that extends through a first chamber into the second, and a transfer tube for carrying exhaust gas from the second chamber to the first. A spark arrester at the exit end of the muffler includes a plurality of slightly spaced plates that permit the outflow of gas but not of large carbon particles, and a closed dish-shaped end plate for receiving the carbon particles.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: October 10, 1978
    Assignee: Skyway Recreation Products
    Inventor: Edward Hugo Hoffman
  • Wheel
    Patent number: D244272
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: May 10, 1977
    Inventors: Charles Joseph Raudman, Jr., Edward Hugo Hoffman